Molding apparatus



1 l 623 560 Apnlv 927 s. B. SHERMAN MOLDING APPARATUS Filed July 11,1925 5 Sheets- Sheet 1 1,623,560 G. B. SHERMAN MOLDING APPARATUS FiledJuly 11, 1925 5 Sheets-Sheet 2 INVENTOR. 66073? filer/nan BY I "A v *fATTORNEY.

April 5, 1927.

. G. B. SHERMAN MOLDING APPARATUS 1.\& \R i3 /////////////r///////////INVEIVIOR. 2 fi/zarman wye ATTORNEY.

5 Sheets-Sheet 4 e. B. SHERMAN MOLDING APPARATUS Fil y 11. 1925 Vv/ /w 0V/ April 5, 1927. I I

& /.M gag AP 1927' cs. B. SHERMAN 623 560 MOLDING APPARATUS.

Filed July 11, 1925 s sheets-sheet s /%44C 6 'g fi-filfer/nah BY IATTORNEY.

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Patented E1, 1927.

Y UNi En srarss earner osrice.

GEORGE B. SHERMAN, OF FLINT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS,TO COPEIYIAN LABORATORIES COlvZZE'AETEZ, FLINT, MICHIGAN, A CORPORATIONMICHIGAN.

Application filed July 11,

This invention relates to a molding apparatus and has for its object aconstruction of a collapsible mold which may be very quickly set up.

One of the uses of this molding apparatus is the molding ofarefrigerator of cast stone. The material I use in the stone isoXy-chloride cement, composed of a miX of about of magnesium chloride,of finely ground silica and of oO-mesh silica sand. To this dry mix isadded sufhcient magnesium chloride in solution to form a good pouringmix. I iiireferably utilize this molding apparatus for makingafrefrigcrator of aconstruction as shown in my .co-pending application.Serial No. 732,6?7, filed August 18, 1924, in whichthe refriger- .a-toris composed of a wooden inner and outer shell secured together in spacedrelation and has a coating of this tiny-chloride cement molded on theoutside surface of the outer shell'and on the inside surface of theinner shell.

l l ith such a refrigerator construction, it

is quite necessary that the wooden shell structure should be accuratelycentered in the mold and one of the features of "this molding apparatusis the automatic centering of this refrigerator shell in the moldingapparatus. This shell'n'iust be spaced from the outer mold section ofthe molding apparatus and inner cores very accurately, so that a uniformcoating of stone will be cast on to the shell.

Among the different features are the means for moving the inner moldsection which carries the cores into position and correctlycentering thecores in place.

Another object isthe means whereby the sub-cores may be moved into placeby a manually controlled means, said subcores be-. ing correctlypositioned automatically which obviously relieves the workman from thetask of correctly centering these subcores l by hand, as is now thepractice In the drawings:

F 1 a l l tl in a )t- 1 11!: a p an new 01 1e mom i 5 ..p 1

ratus.

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is a. section on the line 3-3 of Fig. 2. Fig. 4 is a section onthe line 4ll of DIOLDING APEARATUS.

1925, Serial No. 42,880.

Fig. 5 is a section on the limb-*5 of Fig. 3. i

Fig. 6 is a detail of one end wall of the outer mold section showing theknife plates for closing the end of the mold. 1

r, I a n V Fig. 1 is a detail sectional vlew showing a modified form ofconstruction.

upright position, abutagainst the bottom This bottom wall is providedwith a large opening.

wall 6 of the outer mold section.

7 in which the closnreor core plate is fitted. The closure plate isprovided with tapered side edges which will tightly fit into thetapered'socket of the bottom wall 6. Lugs 8, secured to the core plate,overlap the bottom wall and limit the upward travel of the. closureplate so that the core plate is stopped when the upper surface is justflushv with the inside surface of the bottom Wall. Secured to thisclosure plate are a plurality of cores 9. Obviously if so desired, a

smaller number or one core only may be used.

In the construction shown in Fig. 2, cores are provlded with thepro1ect1ng flange 10 near the base. adjacent to the core plate for p apurpose which will later be described. To raise and lower the lnner moldsection which consists of these cores and the core plate, I

I have shown a wooden refrigerator shell structure which consists of anouter shell 20 and inner shell 21. These shells are secured toegther inspaced relation and are provided with the front wall 22 which isprovided with aplurality of door openings 23. These door openings arevery accurately formed in the shell; the entire shell structure beingaccurately gauged so as to fit the mold.

The first step in assembling the shell struc ture in the moldingapparatus, is to place this shell structure in the mold so that the allsot the shells overlie the cores 9, and the front wall rests on thebottom wall of the outer mold. The hinged walls of the outer mold arenow swung to an upright position and locked in such position by the tiebolts 60, Fig. 1. The centering clamps 25 which are secured to the sidewalls by means of the wing nuts 26 are swung into position. Now theinner mold section is raised, carrying with it the cores 9. The flangesor projected portions of the core which we have designated 10 arearranged to frictionally engage the side of the door openings in theshell and raise the entire shell structure upon the raising the inn rmold section. These centerin clamps 25 are so arranged that the spacelugs 27 are arranged to drop in over the ridge of the side wall and fitthe wood shell and the side wall. These will correctly space the woodenshell structure from the outer mold section. In Fig. l I show how thesecentering clamps are located. I use six in all, two on each side and twoon one of the ends. These centering clamps are also provided with a stopshoulder 28 which engages the back of the wooden shell structure andwhich limits the upward travel of this wooden shell when the same ismoved by engagement with the moving inner mold section. The stopping ofthis shell structure at a predetermined point accuratel spaces the front22 of the shell from the bottom mold walls (3 and permits the stone tofiow down into the bottom of the mold and cover the frontof therefrigerator, up to the door openings. The cement is also poured in thespace between the wooden shell and the cores for forming a stone coatingon the inside of the food chambers of the refrigerator.

In Fig. 7 I show a modified view of the core construction in which thewooden shell is provided with the front 22 and the outer shell 20 andthe inner shell 21 and the core 9 is provided with a straight insideface without the flange 10 as shown in the preferred form ofconstruction. In this case the inner shell 21 is set each so that thestone which flows in betwe .i the inner shell 21 and the core 9 stopswhen it reaches the back of the front wall 22. This form is the same inprinciple as shown in the other figures, the core engaging the side ofthe door openings in the front wall in the same manner as before andraising the same the correct distance so that the front of the shellwill be correct]; spaced from the bot tom wall of the outer moldsection.

The wooden shell is now assembled in the mold and accurately centeredand spaced from the walls of the outer mold sections and cores of theinner mold section. The nest step to insert the subcores for closing thegap at certain points between the cores, for the purpose oi providingpassage-ways in the final product which connect the food chambers witheach other. Fig. 4 shows this ver well. Supported by the guides 30, andcarried by the cores 9 is the subcore 31. T... subcore is connected to alever 23 by pivotallv securing the same thereto as at 33. The lever isslotted as at 34 to provide clearance for relative movement between thesubcore and lever. This lever pivoted to the table 1 at 05 and the lowerend of the lever is engaged by the yoke 36 -arried by the screw 37 whichis preferably mannull controlled. This lever being supported on thetable plenty of clearance must be had at the point where the same issecured to the subcore so as to permit of movement 01"" the inner moldsection to permit the same to drop. as this inner mold section movesrelative to the table. being guided in such vertical movement on theguide pins 38 carried by the table. The core plate is provided with thecars 39 which are preferablv l in number; these cars are provided withdrilled holes which engage the guide pins 38. Fig. at shows one ot' thesuhcores which may be projected between the face oi? the core and abutagainst the adjacent core by turning the screw 37. The subcorc 31 isguided in one of the cores and actuated in the fame waj' as is thesubcore 3'} The lever 32. connecting the subcore with a manuallycontrolled actuating means identical with the actuating means abovedescribed for moving the subcore ill.

The suhcore it) is secured in the mold in a different manner. The core40 is fitted into a corresponding opening in the wooden shell before theshell is dropped into the mold. This core is provided with the centeringslot 41 and a centering key 42 is forced into the center of the slot andaccurately locates this core with respect to the shell structure. Thiscentering hey is actuated bv the lever which is moved by a manuallycontrolled actuating means et-l which is similar in construction to theother subrore a tuat ng means.

The stone which is poured into the mold on the outside surface oi theouter wood shell needs to be stopped at the bottom of there'l'i'gerator. it not being necessary to have stone coat on the bottomof the re trigerator. .s this never in view.

The end wall 4- ot the outer mold section is hinged to the base or tablesupport 1 as at This end wall at carries the ltnives M Fig. 3 which arecarried by the blocks movably guided in the recess 53 in the end loo ill

wee-see wall t. The adjusting screws st may be turned in and bearagainst this block 52 and force the knives 51 into engagement with thewooden shell. This is clearly shown in Fi 3 and because of the fact thatthese knives out ofthe way whe 'r it is desired to remove the drip panfrom beneath the refrigerator;

It is desired to stop the stone also ,a t'this po' it also and I obtainthis seal by' pro-- v ng an extended k nite support 55 (Fig. 3) in theend Wall at. This knife support carries the knife 56 which engagestheyupper ridge of the cutaway portion in the front wall of therefrigeratorshell. The inside edges of said cut away portion are engagedby the knives 57 which are slidabl'y supported by guides 55 carried bythe support 55, tl1-E'SZIIDC being moved outwardly many suitable manner,but here shown as being 'moved by the eccentric cams ac manually turnedthrough the handle 3 'As the front or end wallt ofthe outer mold sectionis swung to an upright position, these knives 5lrand 56 engage the edgeof the wood re-j frigerator shell and seal off that part and knives 5are movedoutwardly to engage the side edges of the recessed or cut awayportion of the front wall of the refrigerator sli'el-lz. ri' ny' gap atthe corners 59 maybe sealed by applyingplaster of Paris theretoby hand.The knives 57 are yieldingly held in a" retracted position by the spring8.

These molds may be very quickly set up and prepared for the castingoperato'n.

ture. Also them-embers S" strike the frame 6 and-"thenthe operatorturnsthe hand Wheel andso'rew 37 to move the suhcore 31 against the companioncor-e. Sinnl'arly the sub-core '31 is projectedin place; Before theshells have'been" laid over the cores the operator has plaoedtl'resub-core in the lower air passagewayof the shells; consequently he maynow operate the hand wheel and screw 4 (see Fig. to'force' the key 42into the key socket 41, whichcorre tly oe'ntersthis sulrcore i deviceswhich cut off the fiow of the cement,

the parts where it is desirable not to have the stone coating. When thewall 4 is raised or is swung u m'nrdly and locked to its oom- It nowbecomes necessary to actuate the p'ani'on walls the knives 51 impiiige'into'tlie' I wooden structure, thereby cutting ofl the flow fi'oll'i thebottom wall of the shell. knives 56 and 57 are also engaged. The shellstructure is' now accurately centered andpositioned in the mold andisr'e'ady for the :asting operation.

After pouring, th e' cement is allowed to harden at which time therefrigerator may be r'eniov'ed from the mold. "ll'ie spa'ce be 5 tweenthe inner and outer shells may be filled with any suitable insulatingmaterial. w

-Wha't I claim is: a T

1.14111 apparatus for moldii'ig' the shell structi'u'e of arefrigeratorcomprising the COli'l-lfilllillllOll of a collr'rpsable' outernroldsection, a movable inn-er moldsection having cores for forming theseveral COlIlP'iiltlll-GIHSS ofthe refrigerator, a sub-coremovablysupported by one of the first named cores, and means formoving thissub-core to bridge the space between two of the first named cores sothat a passageway is formed between two refrigerator con'ipartments.

In a molding apparatus, tll-B'COl11biI121- tion of a support, an outermold section-carried'by said support and provided with an openingopening being tapered, an inner mol'd sec-' tion comprising: a centeringplate having tapered sides, and a plurality of cores each The in thebottom wall, the edges of said ion secured to said closure plate,theinn-er mold section movably supported by said support and means formoving: sa d innermold section to position the cores within the outermold and i'nove the closure plate into the opening in the bottomwall,the-taperedon gagenient of the closure plate and opening? prov dinga tight seal between said plate.

riedZthereby, an inner mold section carried by said supports, meansfor-supporting a shell between said moldsc'ctionsand in spaced relationwith respect to the bottom wall'of the outermold section" and means atthe top of the mold for spacing-said shell with re spect to said moldcsections.

5. In a molding apparatus, the combination of a support, an outer moldsection carried thereby, an inner mold section movably supported by saidsupport and provided with one or more cores; said mold sections spacedwith respect to each other to permit the insertion of a shelltherebetween having one or more openings, the cores of said inner moldsection arranged to lit in the openings of the shell and provided with aportion which engages said shell to raise the same off the bottom wallof the outer mold section upon movement of the inner mold section, andadditional. means for spacing the shell from the side walls of the outermold section and cores and for limiting the up ward movement of theshellto correctly space the shell from the bottom wall of the outer moldsection.

6. In a molding apparatus, the combination of a support, an outer moldsection car ried thereby, an inner mold section movably supported bysaid support and provided with one or more cores, said mold sectionsspaced with respect to each other to permit the insertion of a shellstructure therebetween having one or more openings, the cores -arried bysaid inner mold section arranged to fit in the openings of the shell andprovided with an enlarged flanged portion which frictionally engages theside walls of the openings in the shell to raise the same off the bottomwall of the outer mold section upon movement of the inner mold section,and additional means for spacing the shell from the side walls of theouter mold section and cores and for limiting the upward movement of theshell to correctly space the shell from the bottom wall of the outermold section.

7. In a molding apparatus, the combination of a support, inner and outermold sections supported thereby, the inner mold section provided with aplurality of cores, subcores slidably supported by the first mentionedcores and permitted to be projected beyond the face of the core by whichit is supported to close the gap between two adjacent cores, andactuating means for moving said subcores.

S. In a molding apparatus, the co1nbination of a support, inner andouter mold sections supported thereby, the inner mold section providedwith a plurality ofcores, subscores slidably supported bythe firstmentioned cores and permitted to be pro jected beyond the face of thecore by which it is supported to close the gap between two adjacentcores. and manually actuated means for moving said subcores.

9. In a molding apparatus, the combination of a support, inner and outermold sections supported thereby, the inner mold section provided with aplurality of cores, subcores slidably supported by the first mentionedcores and permitted to be projected beyond the face of the core to closethe gap between two adjacent cores, a lever pivoted to said support andconnected at one end to the sub-core by a slot and pin connection, and amanually controlled actuator carrie by the said support and connectedwith sai lever for the purpose of providing a manna control for movingthe subcore.

10. In a molding apparatus, the combination of outer and inner moldsections, secured together in spaced relation to permit the insertion ofa shell structure thercbctween in spaced relation with respect to saidmold sections to permit the molding of a covering for said shell on theoutside and inside thereof, strips having relatively sharp knife edgesmovably supported by one of said mold sections, and means for movingsaid strips to force the knife edges against said shell to close one endof the mold and pre vent leakage.

11. An apparatus for molding the shell structure of a refri eratorcomprising the combination of a collapsible outer mold section, an innermold section having cores for forming the several compartments of arefrigerator and a subcore adapted to be placed in a position to bridgethe space between two of the first named cores in order that apassageway will be cast between two refrigerator compartments, thissuhcore being removable to permit the molded shell to be removed fromthe cores, and means for removing the subcore. I

12. An apparatus for molding plastic material in the form of a shellstructure for a refrigerator comprising the combination of an outer moldsection, an inner mold section including cores for forming the severalcompartments of the refrigerator, movable subcores for formingpassageways between the several eompartn'ients, and means for stoppingthe flow of plastic material in the outer mold sections so that thebottom of the refrigerator is not included in the shell structure.

13. An apparatus for molding plastic material in the form of a shellstructure for a refrigerator comprising the combination of an outer moldsection, an inner mold section including cores for forming the severalcompartments of the refrigerator, movable subcores for forming pa.ageways l'ictween the several compartments, means for stopping the flowof plastic material in the outer mold sections so that the bottom of:the retrigerator is not included in the shell structure, and means forstopping the flow of material in the outer mold section for providing anopening for the mounting of a swinging apron to the front of therefrigerator.

In testimony whereof I have allixed my signature.

GEORGE B. SHERMAN.

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